.header, .center {
    --header-height: 4.5rem;
}
.header {
    position: fixed;
    width: 100%;
    height: var(--header-height);
    transform: translateY(-100%);
    z-index: 100;
    padding: .5rem;

    border-bottom: 1px solid #1890FF;
    background-color: #f4f4f4;
    box-shadow: 0 0 7px 5px #096dd93b;
}
.center {
    padding-top: var(--header-height);
}
.homeIcon {
    height: 20px;
    transform: translateY(4px);
    cursor: pointer;
}